288 BRITISH BUTTERFLIES. 



whole colouring of the body is pale ochreous-yellow, with mediodorsal, 

 subdorsal, and subspiracular pale rust-red stripes, which are broken up 

 on each segment, being composed of a series of short bands, and those 

 forming the subdorsal series are slightly oblique ; the lateral stripe is 

 continuous round the broad, rounded, and somewhat flattened anal 

 ■extremity; the head is black and shining. Some specimens are paler 

 than others, and some are distinctly yellow after feeding on the yellow 

 petals of the flowers. In general appearance and structure they are very 

 like Lycaena avion larvae, but less pink in colour. After hybernation, but 

 before the 3rd moult (239 days old) the larva measures ± in. long when 

 fixed for moulting; it is of a very pale yellowish flesh-colour; all the 

 markings dull pale pinkish, giving the larva a pale flesh-coloured 

 appearance. Fourth instar; Measures -J in. long (245 days old). The 

 ground colour is now of a pale ochreous-green, with the dorsal, sub- 

 dorsal, and lateral stripes dull pinkish-drab; otherwise it is very 

 •similar to the previous stage, excepting that it is more densely studded 

 with hairs of varying lengths, each with a darker green truncated swollen 

 base encircled with a series of black points ; there are also numerous 

 spiracular-like discs; there is a gland on the 7th abdominal 

 segment, and, on the 8th abdominal segment, below and behind 

 each spiracle, is a retractile tubercle. April 26th*: The larva 

 is in this stage wholly of a clear green colour. Shortly before 

 the fifth (? fourth) moult it measures t 3 q in. long. It is similar to previous 

 stage, excepting that the hairs are longer, and the ground colour 

 is a clear light green, with darker green, but somewhat indistinct, 

 markings. Fifth instari (full grown) : Now measures *6 in. long 

 (about 275 days old). In shape and size it greatly resembles 

 Lycaena avion larva. The small shining black head is set on a 

 moderately long retractile neck, which is frequently produced beyond 

 the 1st segment while it is crawling and feeding, which, when at rest, 

 is completely withdrawn and hidden in the segment. Although the 

 head is disproportionately small for the size of the larva, it is more 

 than twice the size of the minute head of L. avion larva. Dorsal view: 

 The anterior and posterior segments are over-lapping and rounded; 

 the body narrowest anteriorly, widening to the 8th segment; the 

 segmental divisions are deeply cut, each segment boldly convexed. 

 Lateral view: First anterior and last three posterior segments flattened 

 and projecting laterally; the mesothorax to 7th abdominal segment 

 humped dorsally; a slight mediodorsal furrow; the sides sloping and 

 lateral ridge dilated, ventral surface bulbous and ample. The whole body 

 is rather densely sprinkled with finely serrated spinous hairs ; the longest 

 are along the dorsal surface and lateral ridge, where they form a 

 projecting fringe all round the larva, and the first two segments are 

 also covered with longish hairs, and a few are scattered along the sub- 

 dorsal region; all these longer hairs are pale brownish, becoming 

 whitish towards the base, which is in the form of a pedestal, and of a 

 greenish- white colour; the other hairs are very minute, white, 

 and glassy. On the prothoiax is a fan-shaped w T hitish dorsal disc, 



* Frohawk calls this the " Fifth instar," hut seems to have judged this to be 

 so entirely from its different size and its greener tint, changes that occur apparently 

 in this stage without a moult. 



| Frohawk calls this the "Sixth instar," it is most probably the "fifth." 

 Chapman only notes five instars in those he reared at the same time (see postea). 



